<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
</head>
<body>

</body>
</html>

<!-- <script>
	var num = 10+20;
	num = num+20;
	num += 20;
	num -= 30;
	num *=20;
	alert(num)

</script> -->

<script>
	//var a =10;
	//alert(a-- + --a + a + --a + a-- + a);
	//a=10  a--=10  a=9;
	//a=9  --a=8  a=8;
	//a=8;
	//--a=7 a=7
	//a--=7 a=6;
	//a=6
	//10+8+8+7+7+6=46

	var money=10000;
	for (var i = 1; i <= 20; i++) {
		money+=money*0.05;
	}
	alert(money)
	
</script>